CEMENTED CARBIDE TOOL AND METHOD OF FIXING SUPER-HARD TIP

WIPO Patent Application WO/2011/089739

A1

Provided are a tool wherein a super-hard tip, such as a cemented carbide tip, is fixed to a steel base, and which is suitable for use primarily for purposes such as opening a taphole; and a practical method of fixing the super-hard tip in the case of said tool. Said tool is a cemented carbide tool which is characterized in that a super-hard tip is inserted into an internally threaded tip hole formed in the steel base, and that a hold-down ring which is provided with a male thread around the external periphery thereof and is capable of being threadably engaged with said tip hole, is threadably installed in the tip hole in such a way as to be fitted over the super-hard tip, resulting in the super-hard tip being pressed and fixed. It is desirable that the external peripheral surface of the super-hard tip be formed as a conical inclined surface wherein the diameter in the upper portion (tip portion) is smaller and the diameter in the lower portion (base portion) is larger, and that the internal peripheral surface of the hold-down ring be formed as a trumpet-shaped inclined surface which closely mates with the conical inclined surface of the super-hard tip.

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TAKESAKI Hiroshi (())

JP2010/059571

July 28, 2011

May 28, 2010

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TRYTEC Co., LTD (15-36, Harashinmachi Oita-sh, Oita 12, 〒8700912, JP)
株式会社トライテック (〒12 大分県大分市原新町１５－３６ Oita, 〒8700912, JP)

E21B10/52; B25D17/02; B28D1/14

SUGAWARA Hiroshi (20-5, Segawa 4-chomeMinoh-shi, Osaka 45, 〒5620045, JP)

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